Section 13-1-111 - Qualifications of voter(1) A person may not vote at elections unless the person is: (a) registered as required by law;(b) 18 years of age or older;(c) a resident of the state of Montana and of the county in which the person offers to vote for at least 30 days, except as provided in 13-2-514; and(d) a citizen of the United States.(2) A person convicted of a felony does not have the right to vote while the person is serving a sentence in a penal institution.(3) A person adjudicated to be of unsound mind does not have the right to vote unless the person has been restored to capacity as provided by law.En. Sec. 6, Ch. 368, L. 1969; amd. Sec. 1, Ch. 120, L. 1971; amd. Sec. 2, Ch. 158, L. 1971; amd. Sec. 1, Ch. 40, L. 1973; R.C.M. 1947, 23-2701; amd. Sec. 3, Ch. 273, L. 2007.